One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(9,10)(11,15)(12,13)(14,16)(17,18,21,22)(19,25,27,23)(20,28,29,24)(26,30,32,31)(6,8)(10,13)(14,15)(18,22)(20,29)(23,25)(26,32) involution — undirected(5,6)(7,8)(11,16)(14,15)(17,19,21,27)(18,23,22,25)(20,26,29,32)(24,30,28,31)(1,2,3,4)(9,11,12,16)(10,14,13,15)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(9,10)(11,14)(12,13)(15,16)(17,20,21,29)(18,24,22,28)(19,26,27,32)(23,30,25,31)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.